16 lines
409 B
OCaml
16 lines
409 B
OCaml
module type S = sig
|
|
include Set.S
|
|
val exists_opt: (elt -> 'a option) -> t -> 'a option
|
|
end
|
|
|
|
module Make(Elt: Set.OrderedType) = struct
|
|
include Set.Make(Elt)
|
|
|
|
let exists_opt (type a) (f: elt -> a option) set =
|
|
let exception Found of a in
|
|
let f' x = Option.iter (fun x -> raise (Found x)) (f x) in
|
|
match iter f' set with
|
|
| exception Found x -> Some x
|
|
| _ -> None
|
|
end
|